Week 8 - Day 5 PS 3c TRANSFERRING electrons

Atoms bond by transferring electrons! Learn about ions, cations, and anions.

Why do atoms bond? Atoms bond to release the energy stored in their valence electrons. Atoms bond to become more chemically stable. Atoms bond to increase their mass and the radius of their electron shells. When atoms transfer electrons, they are no longer called atoms. They are called-- ions isotopes elements True or False.Helium has 8 valence electrons because it is a noble gas. True False Use your Periodic Table to help you fill in the table below. For each element, indicate how many valence electrons it has. Element Number of Valence Electrons Strontium 2 Aluminum 3 Sulfur 6 Cesium 1 Argon 8 Fill in the table. Each of the following elements will either lose or gain electrons to become cations (positive charged ions)oranions (negative charged ions). Complete the table by filling in each column. You must put the sign (+ or -) AFTER the charges. For example, a charge of negative 3 would be written as 3-. Element Gain or Lose Electrons Cation or Anion? Charge Lithium Lose Cation 1+ Chlorine Gain Anion 1- Aluminum Lose Cation 3+ Nitrogen Gain Anion 3- Magnesium Lose Cation 2+ The number of electronsin the outermost shell of an atom determines its reactivity. Noble gases have lowreactivity because they have full electron shells. Halogens, group 17, are highlyreactive because they readily gainan electron to fill their outermost shell. Alkali Metals, group 1, are also highly reactive because they readily losean electron to empty the outer shell so the shell before it which is full is now the new outer shell. Which of the following metals is the most reactive? Calcium Nickel Mercury Lithium Which of the following elements is most reactive? Carbon Phosphorous Iodine Argon After you submit, please analyze your answers to figure out what you missed.Look up the correct answers if you cannot figure it out. Do this before you take this week's quiz.